const axios = require('axios');
const ContactsApiFp = require('@alohi/faxplus-api').ContactsApiFp;
const Configuration = require('@alohi/faxplus-api').Configuration;

const config = new Configuration({
    accessToken: accessToken,
    basePath: 'https://restapi.fax.plus/v3',
    // Header required only when using the OAuth2 token scheme
    baseOptions: {
        headers: {
          "x-fax-clientid": clientId,
        }
    }
});

async function listContacts() {
    const req = await ContactsApiFp(config).listContacts({
        userId: 'self',
        name: '',
        faxNumber: '',
        offset: 0,
        limit: 50
    });
    const resp = await req(axios);
}

listContacts()

from faxplus import ApiClient, ContactsApi
from faxplus.configuration import Configuration

conf = Configuration()
conf.access_token = access_token
# header_name and header_value required only when using the OAuth2 token scheme
api_client = ApiClient(header_name='x-fax-clientid', header_value=client_id, configuration=conf)
api = ContactsApi(api_client)
resp = api.list_contacts(user_id='self', name='', fax_number='', offset=0, limit=50)

/**
 * Example below uses Apache HTTP Client 4 with Fluent API
 **/

String url = "https://restapi.fax.plus/v3/accounts/self/contacts?offset=0&limit=50";

String result = Request
    .Get(url)
     // The x-fax-clientid header is required only when using the OAuth2 token scheme
    .addHeader("x-fax-clientid", "YOUR_CLIENT_ID")
    .addHeader("Accept", "'application/json'")
    .addHeader("Authorization", "'Bearer {access-token}'")
    .execute()
    .returnContent().asString();

System.out.println(result.toString());

package main

import (
       "bytes"
       "net/http"
)

func main() {

    headers := map[string][]string{
        // The x-fax-clientid header is required only when using the OAuth2 token scheme
        "Accept": []string{"application/json"},
        "Authorization": []string{"Bearer {access-token}"},
        "x-fax-clientid": []string{"YOUR_CLIENT_ID"}
    }

    data := bytes.NewBuffer([]byte{jsonReq})
    req, err := http.NewRequest("GET", "https://restapi.fax.plus/v3/accounts/self/contacts?offset=0&limit=50", data)
    req.Header = headers

    client := &http.Client{}
    resp, err := client.Do(req)
    // ...
}

<?php

require 'vendor/autoload.php';

$headers = array(
    'Accept' => 'application/json',
    'Authorization' => 'Bearer {access-token}',
    // The x-fax-clientid header is required only when using the OAuth2 token scheme
    'x-fax-clientid' => '{client ID}',
);

$client = new GuzzleHttp\Client();

try {
    $response = $client->request('GET','https://restapi.fax.plus/v3/accounts/self/contacts?offset=0&limit=50', array(
        'headers' => $headers,
        )
    );
    print_r($response->getBody()->getContents());
 }
 catch (GuzzleHttp\Exception\BadResponseException $e) {
    // handle exception or api errors.
    print_r($e->getMessage());
 }

 // ...

# You can also use wget
curl -X GET https://restapi.fax.plus/v3/accounts/self/contacts?offset=0&limit=50 \
  -H 'Accept: application/json'  \
  -H 'Authorization: Bearer {access-token}' \
  # The x-fax-clientid header is required only when using the OAuth2 token scheme
  -H 'x-fax-clientid: "YOUR_CLIENT_ID"'